METHOD OF PRODUCTION OF STRONGLY NESTLED SUPERCONDUCTIVE MASSIVE BODIES MADE OUT OF MgB₂ , CONNECTED WITH THEM SOLID FINAL PRODUCTS AND THEIR USE

摘要

FIELD: methods of production of strongly nestled, superconductive massive bodies made out of MgB₂.;SUBSTANCE: the invention presents a method of production of strongly nestled superconductive massive bodies made out of MgB₂ having the density close to the theoretical value. At that the method includes the following stages: a mechanical activation of a crystalline boron with formation of the activated powders; formation of a porous workpiece out of the indicated powders; assembly of the porous workpiece out of boron and the massive forerunners of the metallic magnesium in a container and its pressurization in an aerosphere of a noble gas or with low oxygen content; the thermal treatment of boron and magnesium assembled as stated above, at the temperature above 700C during a time interval exceeding 30 minutes. As a result of it the liquid phase of magnesium infiltrates through the activated powders of the crystalline boron. Mechanical activation of the crystalline boron is conducted by comminution of flakes of the crystalline boron with the help of a repeated crushing at compression under a heavy pressure. The technical result of the invention is simplification of the method of production of strongly nestled products out ofMgB₂ with improved characteristics.;EFFECT: the invention ensures simplification of the method of production of strongly nestled products out ofMgB₂ with improved characteristics.;25 cl, 1 tbl, 4 ex, 5 dwg